The ALCO RSD-7 was a diesel-electric locomotive of the road switcher type built by ALCO at Schenectady, New York between January 1954 and April 1956. Two versions were built, with …

The RSD7, a remarkably robust six-axle locomotive, represented a significant advancement in the company's catalog, surpassing any previous model produced by the company. Notably, it was …

RSD-7 Spotting features: High hoods with notched nose Six-axle trucks (all powered)

相对标准偏差(relative standard deviation；RSD)又叫标准偏差系数、变异系数、变动系数等，由标准偏差除以相应的平均值乘100%所得值，可在检验检测工作中分析结果的精密度。

Unit # Notes Model Serial # Pictures : ALCO DL-601: One of two RSD7 demos: RSD7 81088: 1: 263882: ATSF 601: ATSF Class RSD-7; ex-ALCO Demo 601

The ALCo (American Locomotive Co.) RSD-7/15 locomotives can be considered the 1950s contemporaries of the Fairbanks-Morse Train Masters. These locomotives, with their 2,250 hp, …

The ALCo (American Locomotive Co.) RSD-7/15 locomotives can be considered the 1950s contemporaries of the Fairbanks-Morse Train Masters. These locomotives, with their 2,250 hp, …

RSD-15 Spotting features: Seven-feet shorter than RSD-12 High hoods with notched nose; ATSF, SP & SSW had low-notched nose Six-axle trucks (all powered)

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2013年3月8日 · rsd的标准是企业根据自己的质量控制要求及控制水平制定的，当然有些地方也有参考。 如：2003版验证指南465页给出的验证方案中，总混取样测定含量的RSD＜2%，这个 …